Diagnostic Procedure

DTC B11C4-23; REQUEST SWITCH (LIFTGATE) CIRCUIT MALFUNCTION - DIAGNOSTIC PROCEDURE

Step	Inspection		Action
1	INSPECT REQUEST SWITCH (LIFTGATE) CONNECTOR Switch the ignition to off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Disconnect the request switch (liftgate) connector. Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. Is the connector normal?	Yes	Go to the next step.
1		No	Repair or replace the connector, then go to Step 6.
2	INSPECT LF CONTROL UNIT CONNECTOR Disconnect the LF control unit connector. Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. Is the connector normal?	Yes	Go to the next step.
2		No	Repair or replace the connector, then go to Step 6.
3	INSPECT FOR SHORT TO GROUND IN REQUEST SWITCH (LIFTGATE) CIRCUIT Verify that the LF control unit and request switch (liftgate) connectors are disconnected. Inspect for continuity between request switch (liftgate) terminal A (wiring harness-side) and body ground. Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between LF control unit terminal E and request switch (liftgate) terminal A. If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has a short to ground. Go to Step 6.
3		No	Go to the next step.
4	INSPECT REQUEST SWITCH (LIFTGATE) Inspect the request switch (liftgate). (See REQUEST SWITCH INSPECTION .) Is the request switch (liftgate) normal?	Yes	Go to the next step.
4		No	Replace the request switch (liftgate), then go to Step 6. (See REQUEST SWITCH REMOVAL/INSTALLATION .)
5	INSPECT LF CONTROL UNIT Inspect the LF control unit. (See LF CONTROL UNIT INSPECTION .) Is the LF control unit normal?	Yes	Go to the next step.
5		No	Replace the LF control unit, then Go to the next step. (See LF CONTROL UNIT REMOVAL/INSTALLATION .)
6	VERIFY THAT REPAIRS HAVE BEEN COMPLETED Always reconnect all disconnected connectors. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Clear the DTC for the advanced keyless entry system using the M-MDS. (See CLEARING DTC [START STOP UNIT] .) Drive the vehicle at 5 km/h {3 mph} or more for 2 min or more. Retrieve the advanced keyless entry system DTCs using the M-MDS. (See DTC INSPECTION [START STOP UNIT] .) Is the same DTC displayed?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the start stop unit. (See START STOP UNIT REMOVAL/INSTALLATION .) Go to the next step.
6		No	Go to the next step.
7	VERIFY IF OTHER DTCs DISPLAYED Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [START STOP UNIT] .)
7		No	DTC troubleshooting completed.